Starrett 54481 O1 Tool Steel Flat Stock 0.75x2.5x36 in

Product Description

The STARRETT 54481 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 0.75 inches thick, 2.5 inches wide, and 36 inches long, with a finished weight of 19.13 pounds. Thickness tolerance is held to +/- 0.001 inches, making it suitable for applications where dimensional consistency before heat treatment is critical. Machinists, toolmakers, and die makers select O1 flat stock for its predictable oil-quench hardening behavior and good machinability in the annealed state.

This flat stock is used in tool and die shops, maintenance and repair operations, and general precision fabrication. Typical applications include punches, dies, gauges, bushings, and other tooling components that require a hardenable steel with close dimensional tolerances. The 36-inch length allows multiple blanks to be cut from a single bar. It is sold in single-piece quantities, making it practical for low-volume toolroom use or one-off fabrication jobs.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treatment response
• Thickness tolerance of +/- 0.001 inches for consistent pre-heat-treat dimensions
• Width tolerance of 0.000 to -0.005 inches
• Length tolerance of +0.015 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Single-piece packaging with no minimum order above one unit

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat stock suitable for general toolroom and die-making applications requiring a hardenable, machinable steel bar in this size range.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with appropriate metalworking equipment by qualified machinists or toolmakers. Oil hardening requires proper heat treatment equipment and should follow established metallurgical procedures for AISI O1 steel. Always use appropriate personal protective equipment when cutting, grinding, or heat treating tool steel. Consult applicable shop safety standards before beginning work.